The document provides information about Massachusetts' delegation to the 2012 Democratic National Convention in Charlotte, North Carolina from September 3-6, 2012. It details that Massachusetts will send 135 delegates and 9 alternates to nominate Barack Obama as the Democratic presidential candidate. It outlines the selection process and timeline for the different types of delegates, including 72 district-level delegates, 24 at-large delegates, and 14 Pledged Party Leader and Elected Official delegates.